Write a program to compute a GPA from letter grades. In Eclipse, create a package called program1 (note the lowercase first letter), in which you will create a program called ComputeGPA.

Write the program so that it:

declares and creates a symbol table using the algs31.BinarySearchST class;

fills that symbol table with the following key-value pairs:

Letter	Points
A+	4.33
A	4.00
A-	3.67
B+	3.33
B	3.00
B-	2.67
C+	2.33
C	2.00
C-	1.67
D	1.00
F	0.00

reads a sequence of letter grades from a file called a1grades.txt using standard input, that is, using the method fromFile in the class StdIn in the stdlibpackage. As each grade is read, the program accumulates a total number of grade points by using the symbol table to convert a letter grade to a point value;

computes and prints the GPA.